Configuring And Running Sweeps - Keithley 2601B Reference Manual

Series 2600B System SourceMeter® Instrument Reference Manual
Pulsing in the extended operating area (EOA)
Pulse sweeps can be performed outside of the standard operating area by setting the appropriate
compliance level. Review the specifications for the Series 2600B to determine the maximum current
and voltage values available in pulse mode. When pulsing in the extended operating area (EOA), the
source-measure unit (SMU) will force the pulse to end early if the pulse width exceeds the maximum
value. It will also delay the next source action as necessary to stay within the duty cycle capabilities of
the SMU. The following figure and table illustrate the pulse regions for a SMU when pulsing in the
EOA. Refer to the Series 2600B specifications on the
(http://www.keithley.com) for the latest pulse width and duty cycle information.

Configuring and running sweeps

Use the following topics to configure and run a sweep.
Configuring compliance limits remotely
Voltage and current limits can be configured using the smuX.trigger.source.limitY attribute,
which sets the sweep source limits. For example, to set the SMU A sweep limit to 10 V, execute:
smua.trigger.source.limitv = 10
Configuring end sweep actions remotely
Use the end sweep action to configure the source action at the end of the sweep. The
source-measure unit (SMU) can be programmed to return to the idle source level or hold the last
value of the sweep. Configure the end sweep action by setting the
smuX.trigger.endsweep.action attribute. For example, execute the following command to
configure SMU A to return the source to the idle source level at the end of a sweep:
smua.trigger.endsweep.action = smua.SOURCE_IDLE
Configuring measurements during a sweep
Measurements can be performed during a sweep using the smuX.trigger.measure.Y()
function. When sweeps are run, measurements are stored in the specified reading buffer for later
recall. You can specify which reading buffer will store the readings. For example, to store the voltage
readings taken during the sweep:
smua.trigger.measure.v(vbuffername)
smua.trigger.measure.action = smua.ENABLE
To recall sweep data:
•
Using the front panel: Press the RECALL key, and then select DATA or STATISTICS. For
DATA: select the buffer, and then choose reading numbers to display using the navigation wheel
or cursor keys. For STATISTICS: select the buffer, and then choose MEAN, STD DEV,
SAMPLE SIZE, MINIMUM, MAXIMUM, or PK-PK to display using the navigation wheel
cursor keys. Recalling readings from the reading buffer using the front panel can only be done if
one of the dedicated reading buffers is used to store the sweep data.
•
Remote: Use the printbuffer() function to request buffer readings.
See Reading buffers
2600BS-901-01 Rev. B / May 2013
(on page 3-6) for details about recalling data from the buffer.
Section 3: Functions and features
Keithley Instruments website
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